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Mayfly Species Cinygmula par

Pictures Below
I have not found any specific information about this species in the fly fishing literature, but I did encounter a spinner swarm plentiful enough to make for great fishing in the right kind of stream. However, this was happening at dusk in a stream where the biggest trout were seven inches long and they would all charge any dry fly that hit the water, hatch or no hatch.  

Where & When


Region: West

Time Of Year (?): Summer


Spinner Behavior


Time Of Day: Dusk

Habitat: Riffles
I observed a swarm of thousands of Cinygmula par spinners gathered over a riffle at dusk on a small stream on the east slope of Washington Cascades on July 4th.

Pictures of 3 Mayfly Specimens in the Species Cinygmula par:

Male Cinygmula par Mayfly SpinnerMale Cinygmula par  Mayfly Spinner View 9 PicturesThis spinner came from one of those huge swarms that make one just stop fishing and admire the spectacle. Not bad for a little-known species.

In the same swarm I collected a female and another male.
Collected July 4, 2020 from Mystery Creek #249 in Washington
Added to Troutnut.com by Troutnut on July 12, 2020
Female Cinygmula par Mayfly SpinnerFemale Cinygmula par  Mayfly Spinner View 3 PicturesThis female spinner was captured in a swarm with this male and this other male, allowing for identification.
Collected July 4, 2020 from Mystery Creek #249 in Washington
Added to Troutnut.com by Troutnut on July 12, 2020
Male Cinygmula par Mayfly SpinnerMale Cinygmula par  Mayfly Spinner View 9 PicturesThis specimen was collected from a swarm with a female and another male.
Collected July 4, 2020 from Mystery Creek #249 in Washington
Added to Troutnut.com by Troutnut on July 12, 2020

1 Video of Cinygmula par Mayflies:

Cinygmula par mating flight
It's remarkable what thick hatches, and especially spinner flights, can come from a species few anglers have ever heard of. The genus Cinygmula is thought to produce unremarkable spinner flights, but this one would certainly have gotten the trout going if it weren't happening just before dark on a small stream where there isn't a lot of nocturnal feeding.
State
LocationCabin Creek
Date ShotJul 4, 2020
Date AddedJul 12, 2020
AuthorTroutnut
CameraiPhone Xs

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